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用X射线衍射、脉冲氢氧滴定等方法,研究了添加CeO_2对Ni/γ-Al_2O_3、Pt/γ-Al_2O_3催化剂中Ni、Pt分散度的影响。结果表明,在一定条件下,CeO_2可以在γ-Al_2O_3表面呈单层分散,且有一个最大单层分散量(0.024gCeO_2/100m~2γ-Al_2O_3)。CeO_2的加入可以提高Ni、P~+在γ-Al_2O_3上的分散度,在CeO_2含量未达到最大分散量之前,Ni、Pt的分散度随CeO_2含量的增加而增加,而当CeO_2含量接近或达到最大分散量时,Ni、Pt的分散度则增至最大。
The effects of CeO_2 addition on the dispersion of Ni and Pt in Ni / γ-Al_2O_3 and Pt / γ-Al_2O_3 catalysts were studied by X-ray diffraction and pulse oximetry. The results show that under certain conditions, CeO 2 can be monolayer dispersed on the γ-Al 2 O 3 surface and has a maximum monolayer dispersion (0.024gCeO 2 / 100m 2 γ-Al 2 O 3). The CeO 2 addition can increase the dispersion of Ni and P ~ + on γ-Al 2 O 3. Before the CeO 2 content does not reach the maximum dispersion, the dispersion of Ni and Pt increases with the increase of CeO 2 content. When CeO 2 content approaches or reaches The maximum dispersion, Ni, Pt dispersion is increased to the maximum.